.bpp{
    width: 100%;
    height: 100vh;
    /* border: 1px solid red; */
    /* position: fixed;
    bottom: 0px;
    left: 0px */
}
.bpp .bottom-tab-bar{
    width: 100%;
    height: 50px;
    /* border: 1px solid skyblue; */
    position: fixed;
    bottom: 0px;
    left: 0px;
}